Shadow Broker (Mass Effect 2)

SHADOW BROKER 

Yahg from the game Mass Effect 2 - Lair of the Shadow Broker

The Shadow Broker is an individual at the head of an expansive organization which trades in information, always selling to the highest bidder. The Shadow Broker appears to be highly competent at its trade: all secrets that are bought and sold never allow one customer of the Broker to gain a significant advantage, forcing the customers to continue trading information to avoid becoming disadvantaged, allowing the Broker to remain in business. 

In 2183, the Shadow Broker's identity was unknown; the Broker always operates through an agent. Barla Von refers to the Broker as "he" for convenience's sake, but tells Commander Shepard that he believes the Shadow Broker is a group of individuals: it does not seem possible for a single individual to monitor all of the available information and have such a wide sphere of influence.

The Shadow Broker was part of the reason Tali came to the Citadel: the data file she had proving Saren Arterius had gone rogue put her in danger, but was too valuable to waste. She wanted to trade the information for a safe place to hide, so Dr. Chloe Michel put her in touch with the club owner Fist, who worked for the Broker. However, unknown to her, Fist had changed his allegiances to Saren. The Broker was furious at this treachery, hiring Wrex to assassinate Fist... (more at wiki)